Rekensommen met erbij en eraf tot 100
In de mix
1.
50
40
–
=
2.
70
40
–
=
3.
70
60
–
=
4.
70
20
–
=
5.
30
10
+
=
6.
40
20
–
=
7.
20
30
+
=
8.
20
40
+
=
9.
50
40
–
=
10.
90
20
–
=
11.
100
90
–
=
12.
30
20
–
=
13.
10
10
+
=
14.
100
70
–
=
15.
30
70
+
=
16.
30
30
+
=
17.
100
50
–
=
18.
40
20
–
=
19.
50
20
–
=
20.
90
50
–
=
21.
40
20
–
=
22.
60
20
–
=
23.
20
0
+
=
24.
60
50
–
=